Earth-drilling equipment

ABSTRACT

Earth-drilling equipment comprising a drilling table constructed for use in drilling boreholes and for use in lining boreholes with borehole lining tubes so that both operations may be carried out employing the same drilling table.

United States Patent Dornield et a1. Feb. 15, 1972 [54] EARTHDRILLING EQUIPMENT [56] References Cited [72] Inventors: Eberhard R. Domield, Es-Wiflingshausen; UNITED STATES PATENTS Rudd fle'mecke' Bmchfimnbachi 1 448 172 3/1923 Wellensiek 175/171 z g Neumgen 1,621,569 3/1927 Wellensiek ..17s/171 y 1,835,191 12/1931 Tilly... .....175/l71 [73] Assignee: DeImag-Mmchinenfabrik Rheinhold Dorn- 2,165,666 7/1939 Tilly ..175/ I71 feld, Esslingen am Neckar, Germany [22] Filed: Feb. 20 1970 FOREIGN PATENTS OR APPLICATIONS 1,301,354 7/1962 France 175/171 APPL 9 462,751 11/1968 Switzerland ..175/171 [30] Foreign Application Priority Data Primary Examiner.lames A. Leppink Feb. 28, 1969 Germany ..P 19 10 359.4 and [52 us. 01 ..17s/171,173/16o [571 ABSTRACT [51] I'll. Cl

. g equipment comprrsmg a drilling table con- [58] Field of Search ..175/171, 173, 257, 162, Structed for use in drilling boreholes and f use i li i boreholes with borehole lining tubes so that both operations may be carried out employing the same drilling table.

6 Claims, 3 Drawing Figures PATENYEnFms I972 3.642.078

saw 1 or s 'NVENTOHS RHARD R. DORNFELO OLF 9.6. HENNECKE ACHIM L. KEHRBERGER ATTO NEYS PAIENTEBFEB 1 5 I872 3 642 078 sum 3 OF 3 EBERHARU R. DORNFELD RUOOLF FY13. HENNECKE ACHIM L.KEHRBER6ER BY wamw ATTORNEYS EARTH-DRILLING EQUIPMENT BACKGROUND OF THE INVENTION This invention relates to an earth-drilling equipment, in particular an earth-drilling equipment for attaching to conventional excavators.

In order to set bored piles in any soil it is frequently necessary to line the borehole with a lining tube, whether vertical or inclined. in order to prevent the borehole collapsing if the soil is light.

In the case of known earth-drilling equipment, the lining equipment is disposed separately from the drilling equipment. Furthermore, the lining equipment must always be adjusted to different angles of inclination separately from the drilling equipment. With known lining equipment, the lining equipment is driven intermittently. The intermittent drive is effected by a pair of hydraulic drive cylinders operating so that one drive cylinder rotates the lining tube in one direction then the other drive cylinder rotates the lining tube in the opposite direction. Such equipment has the disadvantage that the lining tube is initially accelerated, and then its progress is arrested, after which it must again be accelerated, with the consequence of high power consumption for driving the equipment.

SUMMARY OF THE INVENTION According to the present invention there is provided an earth-drilling equipment, comprising a drill table provided with a drilling drive for driving a drill rod and provided with a lining drive for driving a lining tube into a borehole drilled by that drill.

Preferably, the drilling table is so constructed that the drilling drive and the lining drive are grouped together. The drilling drive and the lining drive may be coupled to a common motor.

In the preferred embodiments, a driving member is arranged to drive a drill rod and a lining flange is constructed to drive lining tubes into boreholes.

In one embodiment, the lining flange is coupled to the common motor via the driving member.

In a second embodiment, the lining flange and the driving member are separately coupled to the common motor.

Preferably, the lining flange and the driving member are coupled to the common motor by means of a gearshift mechanism whereby the lining drive and the drilling drive may be operated independently of one another. A second driving member may be arranged to be rotatably mounted on the firstmentioned driving member and coupled to the gearshift mechanism, in a manner such that the lining flange is coupled to said gearshift mechanism by said second driving member.

In order to drive the lining tubes, the lining flange may be provided with means for attaching borehole lining tubes of differing diameters. Alternatively, the lining flange may be provided with an annular member and coupling elements for attaching borehole lining tubes to the lining flange, the annular member depending from the lining flange.

BRIEF DESCRIPTION OF THE DRAWINGS Embodiments of the invention will now be described with reference to the attached drawings, in which:

FIG. 1 shows a schematic side elevation of an earth-drilling equipment embodying the invention;

FIG. 2 shows a partial section through a drill table; and

FIG. 3 shows a modification of the embodiment of FIG. 2.

DETAILED DESCRIPTION OF EMBODIMENTS Referring to FIGS. 1 and 2, there is shown earth-drilling equipment comprising a guide mast 1 on which a drill table 2 may glide up and down supported by means of a block and tackle 17. The drill table 2 is adapted to exert a downward thrust. A hydraulic motor 4 drives a driving member 5 which is located in the drill table housing 3. A driving connection between the hydraulic motor 4 and the driving member 5 is made via a gearwheel 6 coupled to the hydromotor 4 and the gear ring 7 secured to the driving member 5 by means of bolts indicated schematically by the reference numeral 8. At the same time, the gear ring 7 also provides one-half of a slewing gear by means of which the driving member 5 is drivable relative to its housing 3. The inner part 9 of the slewing gear is connected to the drill table housing 3.

In the vicinity of the bottom end of the driving member 5. an annular lining flange I1 is secured by means of bolt indicated schematically by the reference numeral 12 or other fixing means in a corresponding recess 10. Driver dogs I3 may be welded or bolted to depend from the lining flange 11 and set at different diameters for differently sized lining tubes. as shown in FIG. 3.

Alternatively, the drive dogs 13 may be replaced by annular member 14 which may be welded on the underside of the lining flange 11, as shown in FIG. 2. With this construction, the corresponding lining tubes may be attached to the end of the annular member 14 by means of coupling elements.

With this arrangement, the operation to drill and line a borehole, commences with the driving member 5 being driven through the gearwheels 6 and 7. Thereby, the driving member 5 drives a drill rod 19 through driver bars (not shown) and the lining tube via the lining flange 11. A hydraulic cylinder 18, which is coupled to the block and tackle I7, is arranged to exert a vertical thrust on the lining tube. The equipment may also be operated in reverse for rotating the drill out of the bore, the block and tackle exerting a simultaneous pulling action.

Referring to FIG. 3, the earth-drilling equipment shown is generally similar to that shown in FIG. 2. The driving table 2 in FIG. 3 is modified in that separate driving members are provided for driving the drill rod 19 and the lining flange. The driving member driving the drill rod 19 operated as described in relation to FIG. 2. However, a second driving member 16 which is rotatably mounted on the first driving member and drives the lining flange, is driven by the hydraulic motor 4 via a gearshift mechanism 15, which is illustrated schematically. This arrangement enables the drill rod to be driven independently of the lining tube. By operation of the gearshift mechanism 15, the equipment may be operated for lining only or for drilling only.

Each of the embodiments hereinbefore described, illustrate earth drilling equipment for drilling and lining boreholes which may be employed for drilling at angles inclined to the vertical and which avoids the adjustment difficulties experienced, when using separate drilling and lining equipments. In addition, with this equipment the power required for the combination operation of drilling and lining is reduced by comparison with that required for separate drilling equipment and lining equipment.

We claim:

1. Earth-drilling equipment, comprising a drilling table supported above the ground and having a housing,

a driving member rotatably mounted in the housing and adapted to drive a drill rod,

a lining flange rotatable with the driving member and adapted to drive a borehole lining tube,

drive means coupled to the driving member,

a block and tackle,

a hydraulic cylinder coupled to the block and tackle for exerting a vertical thrust on the bore hold lining tube, whereby, when the drill table is in use, on operation of the drive means, the driving member drives the drill rod to drill a borehole and the lining flange drives a borehole lining tube into said borehole.

2. Earth-drilling equipment, comprising a drilling table supported above the ground and having a housing,

a driving member rotatably mounted in the housing and adapted to drive a drill rod,

an annular lining flange secured to the driving member and adapted to drive a borehole lining tube,

drive means coupled to the driving member,

a block and tackle,

a hydraulic cylinder coupled to the block and tackle for exerting a vertical thrust on the borehole lining tube, whereby, when the drill table is in use, on operation of the drive means, the driving member drives the drill rod to drill a borehole and the lining flange drives a borehole lining tube into said borehole.

3. Earth-drilling equipment as defined in claim 2, wherein driver dogs are dependently secured to the lining flange, said driver dogs being settable at different diameters for differently sized borehole lining tubes.

4. Earth-drilling equipment, comprising a guide mast,

a drilling table having a housing,

a block and tackle supporting said drilling table for movement up and down said guide mast,

a driving member rotatably mounted in the housing and adapted to drive a drill rod,

a lining flange rotatable with the driving member and adapted to drive a borehole lining tube,

drive means coupled to the driving member,

a hydraulic cylinder coupled to the block and tackle for exerting a vertical thrust on the borehole lining tube, whereby, when the drill table is in use, on the operation of the drive means the driving member drives the drill rod to drill a borehole and the lining flange drives a borehole lining tube into said borehole. 5. Earth-drilling equipment, comprising a drilling table supported above the ground and having a housing, a first driving member rotatably mounted in the housing and adapted to drivea drill rod, a lining flange adapted to drive a borehole lining tube, a block and tackle, a hydraulic cylinder coupled to the block and tackle for exerting a vertical thrust on the borehole lining tube, a second driving member rotatably mounted on said first driving member and adapted to drive the lining flange, drive means for driving said first and second driving members, and a gearshift mechanism for coupling said drive means to said first and second driving members, whereby, when the drill table is in use, on operation of the gearshift mechanism, the drive means may be coupled independently to either one of the first and second driving member so that either drilling or lining is effected. 6. Earth-drilling equipment as defined in claim 5, wherein the drive means comprises a motor, said motor being coupled to the driving member through a gearwheel coupled to the motor and a gear ring secured to the driving member, said gear ring providing one-half of a slewing gear by which the drivingv member is drivable relative to said housing. 

1. Earth-drilling equipment, comprising a drilling table supported above the ground and having a housing, a driving member rotatably mounted in the housing and adapted to drive a drill rod, a lining flange rotatable with the driving member and adapted to drive a borehole lining tube, drive means coupled to the driving member, a block and tackle, a hydraulic cylinder coupled to the block and tackle for exertinG a vertical thrust on the bore hold lining tube, whereby, when the drill table is in use, on operation of the drive means, the driving member drives the drill rod to drill a borehole and the lining flange drives a borehole lining tube into said borehole.
 2. Earth-drilling equipment, comprising a drilling table supported above the ground and having a housing, a driving member rotatably mounted in the housing and adapted to drive a drill rod, an annular lining flange secured to the driving member and adapted to drive a borehole lining tube, drive means coupled to the driving member, a block and tackle, a hydraulic cylinder coupled to the block and tackle for exerting a vertical thrust on the borehole lining tube, whereby, when the drill table is in use, on operation of the drive means, the driving member drives the drill rod to drill a borehole and the lining flange drives a borehole lining tube into said borehole.
 3. Earth-drilling equipment as defined in claim 2, wherein driver dogs are dependently secured to the lining flange, said driver dogs being settable at different diameters for differently sized borehole lining tubes.
 4. Earth-drilling equipment, comprising a guide mast, a drilling table having a housing, a block and tackle supporting said drilling table for movement up and down said guide mast, a driving member rotatably mounted in the housing and adapted to drive a drill rod, a lining flange rotatable with the driving member and adapted to drive a borehole lining tube, drive means coupled to the driving member, a hydraulic cylinder coupled to the block and tackle for exerting a vertical thrust on the borehole lining tube, whereby, when the drill table is in use, on the operation of the drive means the driving member drives the drill rod to drill a borehole and the lining flange drives a borehole lining tube into said borehole.
 5. Earth-drilling equipment, comprising a drilling table supported above the ground and having a housing, a first driving member rotatably mounted in the housing and adapted to drive a drill rod, a lining flange adapted to drive a borehole lining tube, a block and tackle, a hydraulic cylinder coupled to the block and tackle for exerting a vertical thrust on the borehole lining tube, a second driving member rotatably mounted on said first driving member and adapted to drive the lining flange, drive means for driving said first and second driving members, and a gearshift mechanism for coupling said drive means to said first and second driving members, whereby, when the drill table is in use, on operation of the gearshift mechanism, the drive means may be coupled independently to either one of the first and second driving member so that either drilling or lining is effected.
 6. Earth-drilling equipment as defined in claim 5, wherein the drive means comprises a motor, said motor being coupled to the driving member through a gearwheel coupled to the motor and a gear ring secured to the driving member, said gear ring providing one-half of a slewing gear by which the driving member is drivable relative to said housing. 